. Author manuscript; available in PMC: 2017 Jun 1.

Published in final edited form as: J Dev Behav Pediatr. 2016 Jun;37(5):424–430. doi: 10.1097/DBP.0000000000000317

Table 4.

Linear Regression Models Predicting Endorsement of Sleep Concerns

Model	R²	R²Δ	β	p
Predicted: Sleep Onset Delay
Model 1 Predictor: Age	.039	.039	−.20	.406
Model 2 Predictors: Age & Sterol Ratio	.458^**	.419
Age			−.07	.725
Sterol Ratio			.66	.002
Predicted: Sleep Duration
Model 1 Predictor: Age	.040	.040	.20	.395
Model 2 Predictors: Age & Sterol Ratio	.258	.218
Age			.30	.183
Sterol Ratio			.48	.039
Predicted: Total Sleep Disturbance
Model 1 Predictor: Age	.174	.174	−.42	.075
Model 2 Predictors: Age & Sterol Ratio	.428^*	.253
Age			−.40	.051
Sterol Ratio			.50	.017

Note. Overall model fit is significant at

p < 0.05;

^**

p < 0.01